Global Patent Index - EP 1967842 A3

EP 1967842 A3 20100113 - Method and device for measuring the concentration of exhaust gases of a boiler

Title (en)

Method and device for measuring the concentration of exhaust gases of a boiler

Title (de)

Verfahren und Vorrichtung zum Messen der Konzentration von Abgasen eines Kessels

Title (fr)

Procédé et dispositif pour la mesure de la concentration de gaz d'échappement d'une chaudière

Publication

EP 1967842 A3 20100113 (EN)

Application

EP 08150520 A 20080122

Priority

IT BO20070036 A 20070123

Abstract (en)

[origin: EP1967842A2] A device for measuring the concentration (C) of at least one gas species of the exhaust gases of a boiler, this device being equipped with a measuring duct (2) through which the flow (EG) of the exhaust gases leaving the boiler passes; a light source (9) to transmit a light signal (LS) along an optical path (P) extending inside the measuring duct (2) of fixed length (L), this light signal (LS) having a fixed incident intensity (I0) at the inlet (7) of the optical path (P); an optical sensor (10) to detect the light signal (LS) at the outlet (8) of the optical path (P); and a signal processing stage (14 and 15) to process, in electrical form, the detected light signal (LS) and provide a processed signal (ES) that represents a measurement of the concentration (C) of the gas species related to the incident intensity value (I0) and the length (L) of the optical path (P).

IPC 8 full level

G01N 21/35 (2006.01); F23N 3/00 (2006.01); G01N 21/39 (2006.01); G01N 33/00 (2006.01)

CPC (source: EP)

F23N 5/003 (2013.01); F23N 5/082 (2013.01); G01N 21/3504 (2013.01); G01N 21/39 (2013.01); G01N 33/0006 (2013.01)

Citation (search report)

  • [Y] US 5894128 A 19990413 - NAKAMORI AKIOKI [JP]
  • [XY] WO 2004023114 A1 20040318 - TDW DELAWARE INC [US], et al
  • [Y] US 2006133714 A1 20060622 - SAPPEY ANDREW D [US], et al
  • [YP] US 2007187607 A1 20070816 - DOYLE WALTER M [US]
  • [YA] EP 0503511 A2 19920916 - LI COR INC [US]
  • [A] WO 9829741 A1 19980709 - PANAMETRICS [US]
  • [Y] ENGELBRECHT R: "A compact NIR fiber-optic diode laser spectrometer for CO and CO2: - analysis of observed 2f wavelength modulation spectroscopy line shapes", SPECTROCHIMICA ACTA. PART A: MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, ELSEVIER, AMSTERDAM, NL, vol. 60, no. 14, 1 December 2004 (2004-12-01), pages 3291 - 3298, XP004652916, ISSN: 1386-1425
  • [YA] EBERT V ET AL: "Sensitive in situ detection of CO and O2 in a rotary kiln-based hazardous waste incinerator using 760nm and new 2.3mum diode lasers", PROCEEDINGS OF THE COMBUSTION INSTITUTE, ELSEVIER, NL, vol. 30, no. 1, 1 January 2005 (2005-01-01), pages 1611 - 1618, XP025341088, ISSN: 1540-7489, [retrieved on 20050101]
  • [A] J. NIKKARI; J. DI IORIO; M. THOMSON: "In situ combustion measurements of CO2, H20, and temperature with a 1.58um diode laser and two-tone frequency modulation", APPLIED OPTICS, vol. 41, no. 3, 20 January 2002 (2002-01-20), pages 446 - 452, XP002558974, ISSN: 0003-6935

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

EP 1967842 A2 20080910; EP 1967842 A3 20100113; EP 1967842 A9 20090107; IT BO20070036 A1 20080724

DOCDB simple family (application)

EP 08150520 A 20080122; IT BO20070036 A 20070123